養殖ハマチに寄生する〓虫に関する研究-XIII : 成虫の形態, および分類上の位置について

概要

論文の詳細を見る
Plerocercus collected from the body cavity of Seriola quinqueradiata were orally administrated to experimental final hosts, Triakis scyllia. Mature adults were obtained from the valvular intestine of the sharks 15 to 20 days afteradmistration. On the basis of morphological observations made on 10 adult specimens, discussions have been made on the taxonomy of the present species. The shape and arrangement of hooks, especially of the chainette, are similar to those of Callotetrarhynchus gracilis (RUDOLPHI, 1819) DOLLFUS, 1942 and basically similar to Lacistorhynchus tennis (VAN BENEDEN, 1858) DOLLFUS, 1942, too. These two and the present species are all acraspedote. The present species is hyperapolytic and L. tenuis has been reported to be hyperapolytic or euaplytic. However, no work has been carried out on this point for C. gracilis, although the species has been placed in the family Dasyrhynchidae which is anapolytic. On the other hand, a globular part which is known as a specific character of L. tenuis was not observed in the present species and C. gracilis at the postbulbosal region. Therefore, we have proposed tentatively a new name, Callotetrarhynchus nipponica, for the present species until fundamental questions concerning classification differences between the genera Callotetrarhynchus and Lacistorhynchus set by PINTNER (1913, 1931) is solved by helminthologists.
公益社団法人日本水産学会の論文